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Unread 20-01-2010, 15:05
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Ziaholic Ziaholic is offline
Elec/SW Mentor
AKA: Marc
FRC #1164 (Project NEO)
Team Role: Mentor
 
Join Date: Jan 2008
Rookie Year: 2002
Location: Las Cruces, NM
Posts: 194
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Re: bridge/cRio communications sporadic

My team has seen something like this also.

I'm wondering if it is a network configuration issue.

When we are developing, and the 'bot is close to the driverstation, we can sometimes switch from tethered to wireless, and in the process, lose communications for a while. Then, without changing anything, it starts working again.


My theory is that it is network related ... but I need to know something about the cRIO's gateway settings before I can conclude anything.

Here's my theory:
- When wireless, the cRIO (with IP addy: 10.xx.yy.2) uses the bridge (with IP addy: 10.xx.yy.1) as its gateway
- When tethered, the cRIO goes straight to the Linksys wireless router via one of the 4 hard-wired ethernet jacks
- If you leave the bridge powered on, even when you are tethered and not using it, then it could be confusing the network connectivity between the devices. (that is, when the bridge is on and unused, it could be confusing the route between the driverstation and the cRIO)


I need to know if the cRIO gateway setting is hard-set to 10.xx.yy.1. If so, then going from tethered to un-tethered could cause some headaches, especially when the bridge is left on.


I plan on doing some more investigation this afternoon at our team meeting. Stay tuned.
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Team #1164 - Project NEO Robotics
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